There are many great points made. Every response is valuable and has helped me move along in my thinking. I will try to answer/comment on a lot of what was said.
I need to leave this employer. It is not a fit for me. The environment is toxic, the job has been a clusterf* since Day 1 (been there 15 months) and everyone is expected to work round the clock at all salary levels. I need to find another employer. I do need a break, a long one, to recover from the stress that has been this job plus all that has been going on in my life. I have never been an anxious person, but this period of my life has been brutal, and it's taking it's toll on me. I will try to hold on at work because I agree that being employed is better, but I am worried about the effect of all of this stress on my health. And if my schedule picks up again to the point that looking for a job and interviewing is an impossibility because of nonstop meetings and travel, I might have to quit.
Fortunately, I have a very good background with in-demand skills and knowledge. Hopefully that will counterbalance some of the potential age discrimination challenges.
My original plan was to tough it out at this employer no matter what, to get to the FI finish line. The money is good. But it is clear that I cannot hold on for another 4-5 years.
I could, as mentioned on this thread: work part time, get a less stressful job, get another similar job, or quit. Right now I am leaning towards a less stressful job that I will be able to do easily and in an environment where working the standard 40 hours most of the time is possible. This would delay FI, but make it more do-able and more sane given my other family responsibilities and need to take care of my own life.
I am clear about my expenses and what FI needs to look like for me. I can't box myself into an extreme MMM retirement at $25k per year. I'm tied to this area for family reasons, which is above average COL. I have seen plenty of worst case scenarios, and know what can happen. I need enough money to cover my healthcare needs, and to be able to handle the curve balls that inevitably happen costing $$$. Heck, just seeing how expensive my mother's Depends are gives me great pause for my future budget. This is not the type of expense a young person thinks they will ever have.
In the meantime, I need to manage my stress. I only care about what my boss and coworkers think to the point that it affects my employment status, which as I have mentioned, is not solid. But I need to be more zen about it because aside from trying my best within reason, a lot of it is out of my control. I won't work any more hours than I'm already working, and I know that counts against me, but I know my limits and I am already past them.